{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU5136-4HB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU5136-4HB0","canonicalUrl":"https://aoctrl.com/siemens/3RU5136-4HB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU5136-4HB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU5136-4HB0, 50 A rated, adjustable 40–50 A, Class 10, 690 V, screw-type terminals, for S2 contactor size.","salesMarkdown":"It provides Class 10 motor protection, tripping within 10 seconds at locked-rotor condition. It mounts directly onto a SIRIUS S2 contactor (e.g., 3RT1036) via the contactor-mounting fastening method, saving panel space and eliminating separate wiring between the contactor and overload. The 50 A rated operational current (Ie) at 690 V covers most 22–30 kW motor loads on a 400 V supply. The adjustable current range of 40–50 A lets you fine-tune the trip point to the motor nameplate FLA — a critical step for coordination with upstream MCCBs or fuses. This is low enough that no forced cooling is needed in a standard IP54 enclosure, but it should be factored into the panel thermal budget — especially if multiple relays are ganged side-by-side. It can be rotated ±135° on a vertical mounting surface or tilted ±45° front-to-back, giving flexibility in tight enclosures. Side spacing of 6 mm to grounded parts is required for heat dissipation and clearance. Dimensions are 55 mm wide, 105 mm high, and 118 mm deep. The main circuit connections accept 2×(0.5–1.5 mm²) solid/stranded or 2×(0.75–2.5 mm²) finely stranded with ferrules. The auxiliary contact circuit is rated for 1 A at 24 V, 0.22 A at 110 V, and 2 A at 230 V — sufficient for signaling to a PLC input or a contactor coil. Short-circuit protection for the auxiliary switch requires a gL/gG 6 A fuse or a quick-acting 10 A fuse. The relay is designed to IEC/EN 60947-4-1 for electromechanical contactors and motor-starters, and carries the usual Siemens CE/UKCA markings for European markets.","metaTitle":"Siemens 3RU5136-4HB0 SIRIUS Thermal Overload Relay, 50 A, Cl","metaDescription":"Siemens 3RU5136-4HB0 SIRIUS thermal overload relay, rated 50 A, adjustable 40–50 A, Class 10 trip, 690 V, screw terminals, current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"118 mm","Width":"55 mm","title":"3RU5136-4HB0","Height":"105 mm","at 24 V":"1 A","Per Pole":"5.2 W","at 110 V":"0.22 A","at 230 V":"2 A","Trip Class":"CLASS 10","description":"Overload relay 40...50 A size S2, class 10 for motor protection for mounting onto contactors main circuit: screw terminal AUX. circuit: screw terminal manual automatic reset","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","Mounting Position":"with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Thermal overload relay","For Main Current Circuit":"screw-type terminals","power loss [W] total typical":"9 W","Operating Voltage Rated Value":"690 V","Substance Prohibitance (Date)":"07/01/2006","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"50 A","for AWG cables for main contacts":"2x (18 ... 3), 1x (18 ... 1)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"0 ... 100 %","Surge Voltage Resistance Rated Value":"6 kV","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","shock resistance according to IEC 60068-2-27":"8g / 10 ms","Required Spacing For Grounded Parts At The Side":"6 mm","Size Of Contactor Can Be Combined Company-Specific":"S2","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A, quick: 10 A","Tightening Torque For Main Contacts With Screw-Type Terminals":"3 ... 5 N·m","insulation voltage with degree of pollution 3 at AC rated value":"690 V","power loss [W] for rated value of the current at AC in hot operating state":"15.6 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"40 ... 50 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$113.41","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9c475a585d3c19eaa1d572a47558edb2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621242&mlfb=3RU5136-4HB0"},"ai":{"faq":[{"question":"What contactor does the 3RU5136-4HB0 mount to?","answer":"It mounts directly onto a SIRIUS S2 contactor, such as the 3RT1036 series, using the contactor-mounting fastening method. This eliminates separate wiring between the contactor and overload relay."},{"question":"What is the adjustable current range of the 3RU5136-4HB0?","answer":"The adjustable current response value is 40 to 50 A, set via a dial on the front of the relay."},{"question":"What compliance documentation is available for the 3RU5136-4HB0?","answer":"The relay is RoHS compliant with a substance prohibition date of July 1, 2006. It is designed to IEC/EN 60947-4-1 and carries CE/UKCA markings for European markets."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU5136-4HB0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RU5136-4HB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}